1. BTFO - Adjective
2. BTFO - Verb
3. BTFO - Proper noun
BTFO
(vulgar, slang) Initialism of back the fuck off or butt the fuck out.
BTFO (not comparable)
(vulgar, slang) Initialism of blown the fuck out or broke the fuck off; utterly defeated or rejected.
BTFO
(US, education) Initialism of Before the Fall Orientation.